Timeline for The epigraph of a semi-convex function has positive reach
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
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| Apr 22, 2014 at 3:02 | answer | added | Joe Fu | timeline score: 3 | |
| Mar 23, 2014 at 0:30 | answer | added | Connor Mooney | timeline score: 1 | |
| Jan 8, 2014 at 10:07 | comment | added | username | If you can reduce the problem to the case (by an adequate change of coordinates?) where $f(0)=0$, $f$ is even and there is a sequence $(0,-\epsilon_n)$ with two closest points (therefore strictly below the horizontal axis on the graph), you are done, I think, as for any finite constant, $C$, $f(x)+Cx^2$ would not be convex in zero. | |
| S Jan 7, 2014 at 14:59 | history | suggested | username | CC BY-SA 3.0 |
just to clarify
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| Jan 7, 2014 at 14:55 | review | Suggested edits | |||
| S Jan 7, 2014 at 14:59 | |||||
| Jan 3, 2014 at 19:15 | history | edited | Ricardo Andrade | CC BY-SA 3.0 |
removed inappropriate tag; added top level tag; added definition to clarify question
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| Jan 3, 2014 at 17:03 | comment | added | Deane Yang | Perhaps you could provide the definition of reach in the question. | |
| Jan 3, 2014 at 15:21 | history | edited | Suvrit | CC BY-SA 3.0 |
improved formatting a bit
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| Jan 3, 2014 at 14:17 | comment | added | John6 | The original Federer's definition: link page 15 (p 432) | |
| Jan 3, 2014 at 13:08 | comment | added | Alex Degtyarev | What is the reach of a set? | |
| Jan 3, 2014 at 12:54 | review | First posts | |||
| Jan 3, 2014 at 12:54 | |||||
| Jan 3, 2014 at 12:38 | history | asked | John6 | CC BY-SA 3.0 |